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2 years ago

The product of -5 and the sum of X and eight decreased by the product of three and X

Mathematics

1 answer:

Alla [95]2 years ago

5 0

-5(x+8)-3x

simplified would be
-8x-40

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Jasmine wants to use her savings of $1,128 to buy video games and music cds. The total price of the music cd she bought was $72.

Firlakuza [10]

24 video games.

First you subtract $72 from $1,128 then you divide $43 from $1,056 and you get 24.5581395
So the most video games jasmine can buy is 24.

8 0

3 years ago

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3x+2(4x-4)=3 I need help with this asappp

IceJOKER [234]

Answer:

x=1

Step-by-step explanation:

3x+8x-8=3

11x=3+8

11x=11

x=11/11

x=1

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3 years ago

The airplane reaches a height of 5000 meters after approximately 4.5 minutes.

kodGreya [7K]

Answer:

Step-by-step explanation:

The answer is 110 minutes. Just did this on Khan Academy :)

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3 years ago

The population of a certain community is known to increase at a rate proportional to the number of people present at time t. If

attashe74 [19]

Answer:

$t=7.85 years$

Step-by-step explanation:

We can write this rate as an ordinary differential equation.

$\frac{dP}{dt}=aP$

Where a is proportional constant, P the population variable, and t the time.

$\frac{dP}{P}=adt$

Integrating each side of the equation.

$\int \frac{dP}{P}=\int adt$

$ln(P)=at+c$

$P=e^{at+c}$

$P=e^{c}e^{at}=Ce^{at}$

To find C we need to use the initial condiction, it means evaluae P at t=0.

$P_{0}=Ce^{0}=C$

$P=P_{0}e^{at}$

Now, we use the sentence the population has doubled in 5 years.

$2P_{0}=P_{0}e^{a5}$

We can find "a" in this condition.

$2=e^{a5}$

$ln(2)=a5$

$a=\frac{ln(2)}{5}$

$a=0.14$

Finally, let's find how long will it take to triple.

$3P_{0}=P_{0}e^{0.14t}$

$3=e^{0.14t}$

$t=\frac{ln(3)}{0.14}$

$t=7.85 years$

I hope it helps you!

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2 years ago

Help fastttttttttttt quickkkk

Natalka [10]

Answer:66.3

Step-by-step explanation: you multiply 12.5 times 5.3 and the round to the nearest tenth

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2 years ago

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